1. Biomechanics Section, Hamburg University of Technology, Hamburg, Germany.
2. Department of Experimental Surgery and Regenerative Medicine, Ludwig Maximilians University, Munich, Germany.
3. Curasan AG, Frankfurt, Germany.
4. Department of Plastic and Hand Surgery, MRI, TechnischeUniversitätMünchen, Munich, Germany.
5. Center for Applied New Technologies in Engineering for Regenerative Medicine, Munich, Germany.